tree 956fff16b2327818eae72cfe47cf2260986e2fd2
parent b7c2f036284452627d793af981877817b37d4351
author Serge E. Hallyn <serge@hallyn.com> 1306441505 -0500
committer Linus Torvalds <torvalds@linux-foundation.org> 1306442959 -0700

Set cred->user_ns in key_replace_session_keyring

Since this cred was not created with copy_creds(), it needs to get
initialized.  Otherwise use of syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT);
can lead to a NULL deref.  Thanks to Robert for finding this.

But introduced by commit 47a150edc2a ("Cache user_ns in struct cred").

Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Reported-by: Robert Święcki <robert@swiecki.net>
Cc: David Howells <dhowells@redhat.com>
Cc: stable@kernel.org (2.6.39)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>